CN105236624A - Recycling method for zinc-containing wastewater by membrane treatment - Google Patents
Recycling method for zinc-containing wastewater by membrane treatment Download PDFInfo
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- CN105236624A CN105236624A CN201510725291.5A CN201510725291A CN105236624A CN 105236624 A CN105236624 A CN 105236624A CN 201510725291 A CN201510725291 A CN 201510725291A CN 105236624 A CN105236624 A CN 105236624A
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Abstract
The invention relates to a recycling method for zinc-containing wastewater by membrane treatment. The recycling method comprises: processing or electroplating wastewater of zinc firstly enters into a first container and an alkali is added for reaction and treatment; a flocculant is added into water after alkali reaction in a second container; flocculated water enters into a concentration container, namely a wastewater concentration tank; concentrated water enters into a tubular membrane micro-filtration device through a circulating pump; water treated by the tubular membrane micro-filtration device enters into a safety filter through a reverse osmosis water feeding pump and then enters into a reverse osmosis device through a high pressure pump; and water contributed by the reverse osmosis device enters into a reverse osmosis water contributing tank to be recycled. By adopting the tubular micro-filtration device, the treatment system provided by the invention provided by the invention is stable in treatment effect and simple and convenient to operate, can be used for reducing the occupied area, and is very well in zinc-containing wastewater treatment.
Description
One, technical field
The present invention relates to a kind for the treatment of process of zinc-containing water, especially embrane method and comprehensive treating process method to Water circulation.
Two, background technology
Zinc is the heavy metal resources of a kind of reserves on earth compared with horn of plenty.China's zinc resource reserves occupy second place of the world, and zinc resource is also widely used in modern industry production as among smelting, pharmacy and food service industry.Zinc is the indispensable element of HUMAN HEALTH, and it is extensively present in [2] in human muscle and bone, but content is very micro-, if excess serious consequence will occur.The discharge of zinc-containing water has serious harm to HUMAN HEALTH and industrial or agricultural activity, there is the harm such as persistence, toxicity is large, seriously polluted, once can not be biodegradable after entered environment, great majority participate in food chain circulation, and finally accumulate in vivo, destroy organism normal physiological Metabolic activity, be detrimental to health.Along with the increase day by day of the activity in production such as exploitation, smelting, processing of mankind's heavy metal, the heavy metal wastewater thereby of generation is in quantity or kind increases all greatly, causes serious environmental pollution and the wasting of resources.Therefore the improvement of zinc-containing water remains the great research topic of world's field of Environment Protection.
Three, summary of the invention
The present invention seeks to, propose a kind of zinc-containing water embrane method treatment for reuse method, mainly tubular membrane adds reverse osmosis process, and adopt the direct or auxiliary pretreatment technology process of tubular membrane containing waste water such as zinc, water can reuse.By adopting tubular membrane micro-filtration, replace more medium filter, ultrafiltration system (nanofiltration system), as the water inlet of reverse osmosis, water quality stable water outlet, shortened process.
Technical solution of the present invention is, a kind of reuse treatment process of embrane method process (zinc-containing water), first the processing waste water of zinc adds alkali reaction process in the first container, the water of alkali reaction adds flocculation agent in second container, after flocculation, water enters concentrate container and Waste water concentrating groove, tubular membrane micro-filtration is entered through recycle pump again after concentrated, reverse osmosis unit is entered through high-pressure pump again after the water of tubular membrane micro-filtration process enters cartridge filter by reverse osmosis feedwater pump, reverse osmosis unit produces water and enters reverse osmosis produced water tank, and water carries out reuse.
The material of microfiltration membrane is polyvinylidene difluoride (PVDF). membrane pore size is less than 0.5 micron, especially 0.1 micron to 0.05 micron.
Cartridge filter, its filtration reaches 5 microns, and filter core can be changed according to use pressure reduction.
Carry out stirring and pH monitoring respectively in first container and second container and reactive tank or case, add alkali and make pH value at 8-10, make the hardness components such as the zinc in water form precipitation.
Water after second container flocculation reaction overflows in the thickener of tube type filter membrance, is transported to tubular membrane micro-filtration carries out solid-liquid separation with recycle pump.
Now the water of large discharge circulates between Waste water concentrating groove and tubular membrane, (part) film through water (being equal to the water yield of input) enter micro-filtration water tank storage, be then sent to recovery reverse osmosis system.
In reverse osmosis system, do further desalting treatment, this reverse osmosis produced water is sent to reverse osmosis produced water tank.
Meanwhile, tubular membrane also produces a small amount of concentrated solution (mud), needs to be sent to sludge dewatering system, and after plate-and-frame filter press dewaters, the outer process of dehydrated sludge cake committee or directly landfill, disengaging water is then back to system front end and again processes.
Beneficial effect of the present invention: stable water outlet is up to standard; Concise in technology, easy handling; Outside pipe arrangement is few, and installation and maintenance workload is little; Equipments Setting is reasonable, and the pre-treatment of front road can adopt three header containers.Technique is simple, it is little to take up an area; Utilize reverse osmosis membrane, reverse osmosis membrane is the most accurate embrane method liquid separation technology, the solute of solvent and solvent intermediate ion scope is separated, it can stop nearly all solvability salt, water solvent is only allowed to pass through, can remove the suspended substance of the overwhelming majority in water, colloid, organism and salt, desalination rate can reach more than 99%.The standard of Water circulation can be met completely.
Four, accompanying drawing explanation
Fig. 1 is present invention process schema.
Five, embodiment
As shown in the figure, from the reuse of host system intake (must process zinc-containing water, 15-50mg/L or higher), directly enter reaction box 1, 2, especially three headers are adopted (to comprise reaction box 1, reaction box 2, flocculation concentration case) interior interpolation sodium hydroxide, flocculation agent (concrete medicament kind and add dosage and should be determined by pilot scale, as conventional aluminium salt or molysite), alkali (caustic soda or potassium hydroxide is added at reaction box 1, calcium hydroxide liming) reaction, the same control ph, then reaction box 2 is entered, add flocculation agent, then flocculation concentration case is entered, tubular membrane micro-filtration is entered again through recycle pump, need in addition to add a certain amount of clorox for suppressing microbial growth, add sodium hydroxide to maintain reasonable pH value, pH value controls at 8-10, carry out stirring and pH monitoring in case respectively, make the hardness components such as the zinc in water form precipitation.After reaction box 1, reaction box 2 react and the water of flocculation concentration case overflow to enter tubular membrane micro-filtration thickener in, be transported to tubular membrane micro-filtration with recycle pump and carry out solid-liquid separation.Now the water of large discharge circulates between Waste water concentrating groove and tubular membrane micro-filtration, and part film enters the storage of micro-filtration water tank through water (being equal to the water yield of input), the present invention enters tubular membrane micro-filtration through three headers (reaction box 1 reaction box 2, flocculation concentration case) water outlet, the water outlet of tubular membrane micro-filtration enters cartridge filter, then enter reverse osmosis unit, the water outlet of reverse osmosis unit goes to use water terminal.In reverse osmosis system, do further desalting treatment, this reverse osmosis produced water is sent to reverse osmosis produced water tank.Meanwhile, tubular membrane also produces a small amount of concentrated solution (mud), needs to be sent to sludge dewatering system, and after plate-and-frame filter press dewaters, the outer process of dehydrated sludge cake committee or directly landfill, disengaging water is then back to system front end and again processes.
The reuse treatment process of embrane method process (zinc-containing water), the material of microfiltration membrane is polyvinylidene difluoride (PVDF). membrane pore size can reach 0.5 micron, 0.1 micron, 0,05 micron.
Cartridge filter, its pore size filter reaches 5 microns, and filter core can be changed according to use pressure reduction.
The each technique unit functional characteristics of the present invention
Above embodiment, only for illustration of the technical scheme of the application but not the restriction to its protection domain, has in technical field of the present invention and usually knows the knowledgeable, without departing from the spirit and scope of the present invention, when doing various changes and retouching.Therefore, protection scope of the present invention is when being as the criterion depending on those as defined in claim.
Claims (7)
1. a zinc-containing water embrane method treatment for reuse method, it is characterized in that first processing or the electroplating wastewater of zinc add alkali reaction process in the first container, the water of alkali reaction adds flocculation agent in second container, after flocculation, water enters concentrate container and Waste water concentrating groove, tubular membrane micro-filtration is entered through recycle pump again after concentrated, reverse osmosis unit is entered through high-pressure pump again after the water of tubular membrane micro-filtration process enters cartridge filter by reverse osmosis feedwater pump, reverse osmosis unit produces water and enters reverse osmosis produced water tank, and water carries out reuse.
2. reuse method according to claim 1, it is characterized in that the material of tubular membrane is polyvinylidene difluoride (PVDF), membrane pore size is less than 0.5 micron.
3. reuse method according to claim 2, is characterized in that 0.1 micron-0.05 micron, tubular membrane aperture.
4. reuse method according to claim 2, is characterized in that cartridge filter, pore size filter 5 microns, and filter core is changed according to use pressure reduction.
5. reuse method according to claim 1, is characterized in that carrying out stirring and pH monitoring respectively in the first container and second container and reactive tank or case, adds alkali and make pH value at 8-10, make the zinc composition in water form precipitation.
6. reuse method according to claim 1, is characterized in that the water after second container flocculation reaction overflows in the thickener of tubular membrane micro-filtration, is transported to tubular membrane micro-filtration carries out solid-liquid separation with recycle pump.
7. reuse method according to claim 1, it is characterized in that tubular membrane produces a small amount of concentrated solution and mud, be sent to sludge dewatering system, after plate-and-frame filter press dehydration, the outer process of dehydrated sludge cake committee or directly landfill, disengaging water is then back to system front end and again processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510725291.5A CN105236624A (en) | 2015-10-30 | 2015-10-30 | Recycling method for zinc-containing wastewater by membrane treatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510725291.5A CN105236624A (en) | 2015-10-30 | 2015-10-30 | Recycling method for zinc-containing wastewater by membrane treatment |
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| CN105236624A true CN105236624A (en) | 2016-01-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108479429A (en) * | 2018-05-31 | 2018-09-04 | 中国科学院城市环境研究所 | It is a kind of to utilize nanometer Fe3O4The preparation method of modified PVDF microfiltration membranes and its utilization |
| CN116768412A (en) * | 2023-07-21 | 2023-09-19 | 山东省煤田地质局第五勘探队 | Semi-automatic float coal wastewater treatment device and wastewater treatment method thereof |
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| CN201610402U (en) * | 2009-12-23 | 2010-10-20 | 苏州市环境工程有限责任公司 | Recycling and deep treatment device for electronic electroplating wastewater |
| CN104724856A (en) * | 2015-03-26 | 2015-06-24 | 广西壮族自治区环境保护科学研究院 | Treating system and treating method for lead and zinc metallurgical off-gas acid-making wastewater |
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| CN101024537A (en) * | 2006-02-23 | 2007-08-29 | 王俊川 | Electric-plating waste water recovering and utilizing process and apparatus |
| CN101041534A (en) * | 2007-04-27 | 2007-09-26 | 济南晶恒有限责任公司 | Electroplating wastewater treatment reclaiming technique |
| JP4295352B1 (en) * | 2008-12-25 | 2009-07-15 | 株式会社スイレイ | Wastewater treatment equipment for reusing water in surface treatment of trivalent chromate and wastewater treatment method for reusing water |
| CN101659487A (en) * | 2009-01-23 | 2010-03-03 | 云南祥云飞龙有色金属股份有限公司 | Zero emission method of wastewater in lead-zinc metallurgical refinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108479429A (en) * | 2018-05-31 | 2018-09-04 | 中国科学院城市环境研究所 | It is a kind of to utilize nanometer Fe3O4The preparation method of modified PVDF microfiltration membranes and its utilization |
| CN116768412A (en) * | 2023-07-21 | 2023-09-19 | 山东省煤田地质局第五勘探队 | Semi-automatic float coal wastewater treatment device and wastewater treatment method thereof |
| CN116768412B (en) * | 2023-07-21 | 2024-04-12 | 山东省煤田地质局第五勘探队 | Semi-automatic float coal wastewater treatment device and wastewater treatment method thereof |
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